Same chapter3 marksDifficulty: Medium
The mean of 6 numbers is 20. If one number is removed the mean of the rest is 22. Find the number removed.
Statistics
3 marksDifficulty: Medium
Distinguish between raw data and a frequency distribution.
Original Khojo Papers practice question — not from a past board paper.
Answer
Raw data are the observations exactly as they were collected, in no particular order. A frequency distribution arranges them into classes or values with the number of times each occurs, which makes the pattern of the data visible.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Grouping loses some detail but makes the data much easier to interpret.
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